53991722 has 4 divisors (see below), whose sum is σ = 80987586. Its totient is φ = 26995860.

The previous prime is 53991719. The next prime is 53991809. The reversal of 53991722 is 22719935.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 28398241 + 25593481 = 5329^2 + 5059^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13497929 + ... + 13497932.

Almost surely, 2^53991722 is an apocalyptic number.

53991722 is a deficient number, since it is larger than the sum of its proper divisors (26995864).

53991722 is a wasteful number, since it uses less digits than its factorization.

53991722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26995863.

The product of its digits is 34020, while the sum is 38.

The square root of 53991722 is about 7347.9059602039. The cubic root of 53991722 is about 377.9569998584.

The spelling of 53991722 in words is "fifty-three million, nine hundred ninety-one thousand, seven hundred twenty-two".